[Pidgin] #2943: Remove deprecated pidgin_setup_screenname_autocomplete function

[Pidgin]

#2943: Remove deprecated pidgin_setup_screenname_autocomplete function
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 Reporter:  rlaager       |       Owner:       
     Type:  defect        |      Status:  new  
 Priority:  minor         |   Milestone:  3.0.0
Component:  pidgin (gtk)  |     Version:  2.1.1
 Keywords:                |     Pending:  0    
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Ticket URL: <http://developer.pidgin.im/ticket/2943>
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